65078281 has 2 divisors, whose sum is σ = 65078282. Its totient is φ = 65078280.

The previous prime is 65078257. The next prime is 65078309. The reversal of 65078281 is 18287056.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 63744256 + 1334025 = 7984^2 + 1155^2 .

It is a cyclic number.

It is not a de Polignac number, because 65078281 - 2¹⁷ = 64947209 is a prime.

It is a super-2 number, since 2×65078281² = 8470365315829922, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 65078281.

It is not a weakly prime, because it can be changed into another prime (65078081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32539140 + 32539141.

It is an arithmetic number, because the mean of its divisors is an integer number (32539141).

Almost surely, 2^65078281 is an apocalyptic number.

It is an amenable number.

65078281 is a deficient number, since it is larger than the sum of its proper divisors (1).

65078281 is an equidigital number, since it uses as much as digits as its factorization.

65078281 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 26880, while the sum is 37.

The square root of 65078281 is about 8067.1110690259. Note that the first 3 decimals coincide. The cubic root of 65078281 is about 402.2339195335.

The spelling of 65078281 in words is "sixty-five million, seventy-eight thousand, two hundred eighty-one".